GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why do earthquakes usually occur at plate boundaries?
A
The rock on the edges of tectonic plates is soft and gives in easily to various pressures
B
Rock in environments near tectonic plate boundaries experience great stress
C
The boundaries between tectonic plates have been seismically active for millions of years
D
Rockin environments near tectonic p late boundaries experience little stress
Explanation: 

Detailed explanation-1: -Tectonic plates move very slowly relative to each other, typically a few centimetres per year, but this still causes a huge amount of deformation at the plate boundaries, which in turn results in earthquakes.

Detailed explanation-2: -Earthquakes are usually caused when underground rock suddenly breaks and there is rapid motion along a fault. This sudden release of energy causes the seismic waves that make the ground shake.

Detailed explanation-3: -The plates diverge and this causes the construction of new rock. It happens when two tectonic plates pull apart and rock from the mantle rises up through the opening to form new surface rock when it cools.

Detailed explanation-4: -While most earthquakes are caused by the slipping of tectonic plates, minor earthquakes can also be caused by volcanic eruptions, collapse of rock formations on Earth’s surface, or underground explosions.

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